Most notable, probably, is the small size and sharp fall of the drain pipes. Further than this, it will be seen that the drain is disconnected from the sewer by a trap, and that it is accessible for inspection throughout, simply by lifting certain iron covers (Fig. 22). A close examination would show that every foot of drain pipe and discharge pipe is so ventilated, that there will be a current of air through it; that no appliance discharges into the drain direct, but that there is an atmospheric disconnection in every case; that air from discharge pipes of sinks, &c., is all trapped from the house; that there is separate water supply for closets, and for other purposes; and that no cistern has any connection with the drains. Further will be noticed, the difference in construction of the closets, &c. The foregoing abstract of Burton’s paper is replete with valuable information. One obvious inference to be drawn from it is that where the occupant of a dwelling has serious doubts as to its sanitary conditions and cannot rely on his own observation for ascertaining the facts, he should forthwith engage the services of a specialist like the author of the paper to aid him in coming to a decision. One of the most instructive lectures on house sanitation was that delivered by Prof. Corfield at the Parkes Museum in 1883. He considers that the best plan in the examination of a house is to begin at the top of it, proceeding downwards, and noting the different mistakes that are likely to be made in the sanitary arrangements in various parts of the house. Following out this idea, we will deal with each item in descending order.